Rotary engine



2 Sheets-Sheet 1.,

A. E.- MARSHALL.

Rotary Engine.

Patented Dec. 7, I880.

ATTORNEY N- F5523. PHOTO-L|TNOGRAPHER. WASHINGTON. D, 0.

2Sheets-Sheeu 2. A. E. MARSHALL.

- Rotary E "ne. No.- 235,266. atented Dec. 7,1880.

1 agwmlww" ATTORNEY UNITED STATES ATENT lFFlC a.

AARON E. MARSHALL, OF BRAZIL, INDIANA.

ROTARY ENGINE.

SPECIFICATION forming part of Letters Patent No. 235,266, dated December 7, 1880,

Application filed September 15, 1879.

To all whom it may concern:

Be it known that I, AARON E. MARSHALL,

of Brazil, in the county of Clay and State ot'- Indiana, have invented certain new and useful Improvements in Steam-Motors; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to letters of reference marked thereon, which form a part of this specification.

This invention relates to certain improvements in steam-motors or rotary engines; and it consists in a rotating cylinder having a series of chambers or pockets 011 one or both sides covered by a disk provided with portholes leading to said chambers, in combination with one or more steam-chests provided with induction and eduction ports, by means of which the steam may be supplied to and exhausted from the pockets or chambers and cause the cylinder to rotate In the drawings, Figure 1 represents an elevation of one of the steam-chests; Fig.2, a similar view of the other steam-chest detached. Fig. 3 is an elevation of the rotary cylinder, showing the recesses or chambers in the side of the same. Fig. 4. is an elevation of the disk provided with port-holes. Figs. 5 and 5 represent views of modifications of the steam-chest. Fig. 6 is a side elevation of the same. Fig. 7 is a side elevation of engine complete. Fig. 8 represents a modification of the rotary cylinder. of the same. Fig. 10 indicates another modification of the rotary disk, and Figs. 11, 12, 13, 14, and 15 views of the steam-connections for supplying steam to the engine.

The letter A indicates the engine, in the present case consisting of a rotating disk or cylinder, B, having two series of chambers, recesses, or pockets, 0, on opposite sides, the said recesses being inclined gradually to an abrupt shoulder, b,on one side, and those on the other side in an opposite direction to an abrupt shoulder, 1), (shown in dotted lines in Fig. 3,) so that the direction of the engine may be reversed. The letter 0 indicates the steam- Fig. 9is a side elevation chests, one of which, in the present instance, is located on each side of the rotating cylinder, and D is a disk provided with a series of port-holes opening into the chambers in the cylinder. Said cylinder and disk are rigidly secured to a shaft journaled in bearings secured to the steam-chests at the center of the same.

The steam-chests are connected, by means of pipes or ports G, with any suitable steamgenerator or boiler, and from said chests extend induction-ports H, through which steam may be supplied to the pockets or chambers of the rotating cylinder through the portholes in the disk D.

The letter K indicates the exhaust-ports, which lead into angular chambers L, opening at the periphery of the steanrchests into the atmosphere, for the discharge of the steam escaping from the pockets or chambers.

In the modification shown in Fig. 3 the pockets are angular in configuration, and in Figs. 5 and 6 they are circular.

The letter R, Figs. 11, 12, 13, and 15, indicates a connection consisting of a pipe having two branches, from which extend connections to the steam-chests, which connection may be provided with a three-way cock, S, Fig. 15, for directing the steam to either side of the engine to the respective steam-chests at will.

The steam-chests are provided with flanges T, which overlap the edges of the rotating cylinder to prevent the escape and loss of steam.

It is evident that a single engine can be constructed, if desired, upon the principle above described by omitting one of the steamchests and leaving the corresponding side of the rotating disk plain.

The power obtained by the rotating wheel may be transmitted through the medium of the aXle on which it is mounted or by means of a belt or band passing directly around the periphery of the cylinder.

I claim- In a steam-motor, the combination of the rotating cylinder 0, provided with the two series of inclined chambers or pockets 0 O, terminating in abrupt shoulders I) and b on opposite sides of said cylinder, the perforated disks D, seeurely fastened to :1 common rotating shaft, and the steam-chests C, provided with the ports (1, II, and ll, the several parts 5 constructed and relatively arranged to operate ill the manner herein shown and described.

In testimony that I claim the foregoing] have hereunto set my hand this 7th day of August, 1879.

AARON E. MARSHALL.

Witnesses (Inn's \V. CURL, HARRY LUsK. 

